Thank you for this great post . but i don't agree with you about the bounce rate !!! ....Matt said that Google dose n't use Google analytic for ranking .but actually they have their own metrics ( that don't depend on Google analytic ) and bounce rate is a ranking factor ..if SEOmoz approve my post , i will discuss this idea .

Very nice article,Unfortunately a lot of SEO companies are still using these kind of tactics and even worse they ranked well in search engines :( .Directory submission and Bookmarking and spammy forums links are very dangerous for your company !